Thanks for info and contact. I understand software limitations. Maybe future will allow to add some non-music features.
I for one appreciate the singular focus on music of great quality in a small package with an uncluttered UI. In my experience, the more functionality you add beyond core function (music!), the slower the unit responds and with increased potential for glitches.
Auto-shutoff is of course different, not a "bell and whistle" but a way to extend battery life so the music can play on. But please leave the games and books to the smartphones, e-readers etc...